JPH0620154Y2 - Clock body pointer correction mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a correction mechanism for correcting the minute hand and hour hand of a timepiece, or for correcting and setting a pointer including a reference hand.

[Prior Art] Today, as a correction mechanism for a minute hand and an hour hand of a timepiece, a correction knob provided by protruding one end of a correction shaft integrated with a minute hand shaft to the front or back surface of the timepiece, or a sixth As shown in the figure, a correction pin 18 that meshes with the back wheel 44 of the day is provided, and the correction knob is
Many of them rotate the minute wheel and hour hand by rotating 10, which in turn rotates the minute hand and hour hand.

Further, in the past, in order to reduce the load on the motor for driving the minute hand and the hour hand, the correction shaft 12 can be slid in the axial direction, and as shown in FIG. And the date indicator wheel 44 or minute hand wheel are disengaged, and when adjusting the pointer, the adjusting knob 10 is pulled out against the elastic body 26, so that the adjusting pin 18 and the date indicator wheel 44 are engaged. Modify knob while letting
There was one that rotates 10 to adjust the time.

Some alarm clocks share a time adjustment knob and an alarm time setting knob.
In this type of watch body, as shown in FIG. 8, the correction shaft 12 is normally positioned by the elastic body 26 at a position where the correction pin 18 meshes with the reference wheel 46, and the correction knob 10 is pulled out to correct it. The minute hand and hour hand can be rotated by engaging the pinion 18 with the back wheel 44 of the sun.

[Problems to be Solved by the Invention] Since a quartz oscillator and a step motor are used to drive the minute hand and the hour hand in the timepiece today, the minute hand and the hour hand need to be corrected because extremely accurate drive is performed. The sex is getting lower.

Then, as described above, in the timepiece body in which the correction shaft is always connected to the minute hand wheel or the like indirectly through the correction kana or directly without the correction kana, the correction knob is inadvertently given a shock or the like. This will cause the hands to rotate by rotating the minute hand and hour hand.Also, even with a watch body in which the correction pin is removed from the back wheel of the sun due to the elastic body, the hands may be misaligned due to careless handling. It was

That is, although the correction knob is for correcting the display time deviation due to the minute hand and the hour hand, there is a problem that the display time is incorrect due to the correction knob.

[Means for Solving the Problems] The present invention provides a time correction mechanism in which an elastic body normally positions the correction shaft at a position where the correction pin is removed from the timepiece train. At the peripheral edge of the shaft hole of the bearing plate, notches through which the protrusion can pass are provided at one or a plurality of positions, and a correction knob is pulled out against the elastic body, and the protrusion provided on the correction shaft has the notch. At the position where the correction shaft is slid in the axial direction up to the position where the correction shaft has passed, the correction shaft is provided with a locking portion that prevents the correction shaft from sliding by the locking portion. The modified pinion has a structure that meshes with the clock train wheel.

[Operation] In the mechanism for correcting a pointer according to the present invention, the correction pin is normally removed from the timepiece train by the elastic body, and the protrusion provided on the correction shaft is made to coincide with the notch provided on the peripheral edge of the shaft hole. If the correction knob is not pulled out further in this state, the correction pinion cannot be engaged with one of the gears of the clock train, such as the back wheel of the day, and the correction knob is pulled out at a predetermined angle position and engaged by the locking part. The minute hand and the hour hand can be rotated by the correction knob only when they are rotated while being further pulled to the stopped position.

[Embodiment] In the embodiment of the time adjustment mechanism according to the present invention, as shown in FIG. 1, the rear end of the correction shaft 12 slidable in the axial direction is received by a receiving plate 34.
Also, the correction knob 10 is protruded from the watch body exterior 42 and is provided at the rear end.
And the tip of the correction shaft 12 penetrates a base plate 32 supporting the train wheel in cooperation with the receiving plate 34, and is suspended between the first washer 22 attached to the end and the base plate 32. An elastic body 26 such as a coil spring is provided to urge the correction shaft 12 so as to pull it into the watch body.

Further, a second washer 24 is provided at an appropriate position in the middle of the correction shaft 12, and the second washer 24 is brought into contact with the base plate 32 to prevent the correction shaft 12 from being pulled into the watch body beyond a predetermined position. The correction shaft 12 is fixed in a predetermined position by the urging force of the elastic body 26 and the second washer 24 unless an external force is applied.

Then, in this normal state, the correction pinion 18 is fixed to the correction shaft 12 in accordance with the position where it meshes with the reference wheel 46, and the locking ring 16 is attached to the correction shaft 12 so that the elastic body 26 is attached. When the correction shaft 12 is pulled out against the force, the locking ring 16 is brought into contact with the inner surface of the receiving plate 34 as shown in FIG.
Are prevented from being drawn more than necessary. The position where the locking ring 16 as the locking portion is attached to the correction shaft 12 is the position where the locking ring 16 contacts the inner surface of the receiving plate 34 when the correction pinion 18 is pulled out to the position of the back wheel 44 of the day. It is what

Further, when the correction shaft 12 is in the normal position by the elastic body 26, the correction shaft 12 is formed with a protrusion 14 at an intermediate position between the locking ring 16 and the receiving plate 34, and the tip end position of the protrusion 14 is formed. Is projected outward from the diameter of the shaft hole 36 for the correction shaft 12 provided in the receiving plate 34, and the peripheral edge of the shaft hole 36 is slightly smaller than the protrusion 14 as shown in FIG. With a large cutout 38
It is provided at intervals of 180 °. In addition, the protrusion 14 is the fifth
It is not limited to the case where only one is provided as shown in FIG. A, but it may be provided on both sides such that the correction shaft 12 is penetrated by other members as shown in FIG. 5B.

Also, the correction knob 10 or the correction shaft depending on the compression height of the elastic body 26
When the correction pinion 18 is attached to the correction shaft 12 so that the correction pinion 18 meshes with the back wheel 44 of the sun at the pullout limit position of 12, the locking ring 16 is omitted and the first washer 22 is used as the locking part. can do.

In this embodiment, as described above, the elastic pin 26 positions the correction shaft 12 at the position where the correction pin 18 is disengaged from the back wheel 44 of the sun, so even if the correction knob 10 is carelessly rotated, the minute hand and the hour hand. Even if the correction knob 10 is simply pulled out without rotating, the projection 14 provided on the correction shaft 12 prevents the correction shaft 12 from being pulled out largely by hitting the receiving plate 34, and the correction pin The 18 is never meshed with the day wheel 44 (see FIG. 2). Then, the correction knob 10 is further pulled out by aligning the protrusion 14 with the notch 38 formed in the peripheral edge of the shaft hole 36, and the correction shaft 12 is prevented from sliding by the locking portion such as the locking ring 16. Adjust knob 10 only when rotating it while pulling it against the elastic body 26
Thus, the minute hand and the hour hand can be rotated, and it is possible to prevent the minute and hour hands from being carelessly rotated and the display time being deviated.

As described above, in this embodiment, the protrusion 14 provided on the correction shaft 12 is formed in the shaft hole.
Only when the correction knob 10 is pulled out at a predetermined angular position so as to be positioned in the notch 38 formed on the peripheral edge of the 36, the correction pinion 18 is brought into mesh with one gear in the clock train such as the back wheel 44 of the day. It is possible to adjust the display time by carefully pulling out the correction knob 10 as if searching for the position of the notch 38, and rotating the minute hand and hour hand only when rotating the correction knob 10 in a pulled state. Is.

Then, as in the present embodiment, an alarm clock in which the correction pin 18 is engaged with the reference wheel 46 at a position where the elastic pin 26 biases the correction pin 18 away from the clock train of the rear wheel 44 of the day. Particularly, there is an advantage that the display time is not confused when used by a plurality of people like the clock body provided in the accommodation facility and the alarm time can be set immediately.

If the correction shaft 12 has only one protrusion 14, the shaft hole 36
The number of notches 38 formed in the peripheral edge of the can also be one.

[Advantages of the Invention] In the timepiece pointer correction mechanism according to the present invention, the correction pin is normally removed from the timepiece train by the elastic body, and even if the correction knob is rotated, the minute hand and the hour hand are not rotated. ,
Also, because the correction shaft has a protrusion, even if the correction knob is accidentally pulled out, the protrusion contacts the receiving plate and the correction pinion meshes with one gear in the timepiece train wheel of the back wheel of the sun. Since it is prevented from doing so, it is possible to prevent the display time from being deviated by inadvertently rotating the minute hand and the hour hand.

[Brief description of drawings]

FIG. 1 is a view showing a pointer correction mechanism according to the present invention, showing a state in which the correction shaft is located at a normal position, and FIG. FIG. 3 is a diagram showing a state in which the correction shaft is pulled out to a position where the pointer can be rotated, and FIG. 4 is a diagram showing a shaft hole provided in the receiving plate. FIG. 5 is a view showing a cross section of the correction shaft, and FIGS. 6 to 8 are views showing a conventional pointer correction mechanism. 10 …… correction knob, 12 …… correction axis, 14 …… protrusion, 18…
… Corrected kana, 26 …… elastic body, 34 …… support plate, 36 …… shaft hole,
38 …… notch, 44 …… behind the day car, 46 …… standard car.

Claims (1)

[Scope of utility model registration request] 1. A correction shaft having a correction knob at one end and a correction pin at an appropriate position is provided slidably in the axial direction. The correction shaft is urged to the disengaged position, and the correction shaft is provided with a projection so that the projection can be brought into contact with the shaft hole of the correction shaft to prevent the correction shaft from being pulled out. A notch through which the protrusion can pass is provided on the periphery of the shaft hole of the correction shaft, and a locking portion that prevents the correction shaft from sliding at the position where the protrusion passes through the notch is provided. When the correction shaft is provided at the position where the correction shaft is prevented from sliding by the locking portion, the correction pinion provided on the correction shaft meshes with one gear of the timepiece train wheel. Pointer correction mechanism.